Dark Souls IGN Review

The reviewer's job is difficult when it comes to a game like Dark Souls. I simply can't unreservedly recommend that you buy it. It's not a game that you play to relax. It doesn't care in the slightest about whether you're enjoying yourself, and it doesn't give a fig for your notions of entertainment or your mental well-being. If you just play games for fun, this isn't for you, and no amount of insistence on my part is going to change that. But if you're interested in the limits of the videogame form – to see just how focused, how pure and how uncompromising in its vision a game can be – Dark Souls is unmissable. If you take the time get into Dark Souls' mindset, to begin to understand the twisted way in which it operates and taste the rewards behind its cruellest challenges, this is one of the most thrilling, most fascinating and most completely absorbing experiences in gaming.

http://ps3.ign.com/articles/119/1197278p1.html